# Copyright 2021 Alibaba Group Holding Limited. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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# =============================================================================
"""Implementation of parallelism strategy of replicate."""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

from epl.strategies.parallel_strategy import ParallelStrategy


class Replicate(ParallelStrategy):  # pylint: disable=invalid-name
  """Class for data parallelism. Taskgraph in replicate strategy will be clone to
  other devices."""

  def __init__(self, device_count=None, name=None):
    """Create replicate strategy.

    Args:
      device_count: number of devices for one TaskGraph replica.
      name: name of the strategy.
    """
    super(Replicate, self).__init__(device_count, 'Replicate' if name is None else name)



def replicate(device_count=None, name=None):
  """replicate strategy."""
  return Replicate(device_count, name)
